i know for a fact its not Kate! if you ever watch the 'behind the scenes' the whole entire crew loves her && she loves them they all hug and have smiles on there face. I'm sure its Claire which is kinda disappointing cause she is one of my favorite characters on the show.

notice that when he asked for 200 to the old lady and she said i thought it was 100 he said well thats before i found out it was murder and then when he was in the room its like he knew the ghost was there or something

and when Naomi died and he knew how she died when he was by her body. did he talk to her? why did they make him a ghost whisper? how are they gonna use that in the show?

i was kinda thinking its miles the way the talked && how he was the only one who wanted to find Ben while the rest wanted to do research. but as i read everyone else comments theres a chance it could be Michael but didn't he have a son? if he was a spy would he have his son? wouldn't it be putting his kid in danger?